Senes ebwakd abchjbaiid



March 22,1932. s. E, ARICHIBALD 1,859,649

BRAKE DRUM Filed July 8, 1951 BIJII'I I III/ Ira Inventor 1 UNITED? STA Patented 1932 res PATENT OFFICE snims nnwaan or nnanronn'rmmvma remnanti Application fled July 8, 1881 Serial 10. 549,582. 7

bestos, heat would be prevented, and as is i This invention relates to certain new and useful improvements in brake drums havmg particular reference to vehicular wheel brake drums and the object of the present inventionis .to reduce to a minimum trouble arising from the heating of brakes.

A still further object of the invention is to provide a brake drum having a lining covering the inner face, of the peripheral wall of the brake drum, together with improved means for anchoring the lining within the drum.

Other objects and advantages of the invention will be apparent from the following description, taken in connection with the accompanying drawings wherein:

Figure 1 is' an elevational view of a brake drum constructed in accordance with the present invention.

-F'gure 2 is a longitudinal sectional view therethrough.

Figure 3 is a plan view of the brake lining.

Figure 4 is a plan view of two retaining rln l%ith reference'more in detail to the drawings, it will beseen that 5 designates generally a brake drum which is circular, and the peripheral wall 6 of the brake drum on its inner face is, provided with a circular series of mortise grooves 7. v

An annular or circular brake lining 8 formed of asbestos or other suitable material is provided on its outer face with a seriesof mortise ribs 9fitting conformably the grooves -7 as shown in Figure 1 thus covering the entire inner face of the wall 6.

A split resilient retaining ring 10 fits withv in the confines of the lining-8, and is received within an annular groove 11 provided on the inner peri heral face of the lining 8 at that Q end of the 'ng ad acent the open end of the drum 5.

Thus it will be seen,

dium of the mortise ton e and ye con-' nection between the wal of the rake drum therefor together with the ring, securely retained in posiand the lining 1 0, the lining will be tion within the brake drum and against rotative movement relative to the drum.

In providing the lining 8 of molded as also thought apparent when the lining is worn out a new lining may be readily subvention, it is to be understood that the same is susceptible of further changes, modifications and improvements coming within the sccipe of the appended claims,

aving thus described myjnvention, what I claimas new is:

-1. In combination a brake drum having a peripheral wall provided with grooves, an

annular lining fitting within the drum and rovided wit a circular-series of tongues tting within said grooves, and an expansible member arranged within the confines of the lining and normally urging the same radially into engagement with the periphery of the drum. 7 y H 2. In combination :a-brake drum, an annular lining fitted within the drum, and

means for securing said lining within the drum, said last mentioned means includin mortise connection between the peripherfi wall of the drum andsaid lining, together witha split ring arranged: within the con-- fines of said lini 3. In combination a brake drum, an anmane mentioned means includin mortiseconnection between the periphera wall of split ring ,nular lining fitted within the drum, and means for securing said lining within the drum, .7 that through the 1113- said lining,and said lining provided with ai circular ve for receivin said ring.

In-testlmon whereofIa x m signature.

SENES DWARD ARCIBALD. 

